"""
    SleekXMPP: The Sleek XMPP Library
    Copyright (C) 2010 Nathanael C. Fritz
    This file is part of SleekXMPP.

    See the file LICENSE for copying permission.
"""
from __future__ import with_statement
from . import base
import logging
from xml.etree import cElementTree as ET
from .. xmlstream.stanzabase import registerStanzaPlugin, ElementBase, JID
from .. stanza.presence import Presence
from .. xmlstream.handler.callback import Callback
from .. xmlstream.matcher.xpath import MatchXPath
from .. xmlstream.matcher.xmlmask import MatchXMLMask
from sleekxmpp.exceptions import IqError, IqTimeout


log = logging.getLogger(__name__)


class MUCPresence(ElementBase):
    name = 'x'
    namespace = 'http://jabber.org/protocol/muc#user'
    plugin_attrib = 'muc'
    interfaces = set(('affiliation', 'role', 'jid', 'nick', 'room'))
    affiliations = set(('', ))
    roles = set(('', ))

    def getXMLItem(self):
        item = self.xml.find('{http://jabber.org/protocol/muc#user}item')
        if item is None:
            item = ET.Element('{http://jabber.org/protocol/muc#user}item')
            self.xml.append(item)
        return item

    def getAffiliation(self):
        #TODO if no affilation, set it to the default and return default
        item = self.getXMLItem()
        return item.get('affiliation', '')

    def setAffiliation(self, value):
        item = self.getXMLItem()
        #TODO check for valid affiliation
        item.attrib['affiliation'] = value
        return self

    def delAffiliation(self):
        item = self.getXMLItem()
        #TODO set default affiliation
        if 'affiliation' in item.attrib: del item.attrib['affiliation']
        return self

    def getJid(self):
        item = self.getXMLItem()
        return JID(item.get('jid', ''))

    def setJid(self, value):
        item = self.getXMLItem()
        if not isinstance(value, str):
            value = str(value)
        item.attrib['jid'] = value
        return self

    def delJid(self):
        item = self.getXMLItem()
        if 'jid' in item.attrib: del item.attrib['jid']
        return self

    def getRole(self):
        item = self.getXMLItem()
        #TODO get default role, set default role if none
        return item.get('role', '')

    def setRole(self, value):
        item = self.getXMLItem()
        #TODO check for valid role
        item.attrib['role'] = value
        return self

    def delRole(self):
        item = self.getXMLItem()
        #TODO set default role
        if 'role' in item.attrib: del item.attrib['role']
        return self

    def getNick(self):
        return self.parent()['from'].resource

    def getRoom(self):
        return self.parent()['from'].bare

    def setNick(self, value):
        log.warning("Cannot set nick through mucpresence plugin.")
        return self

    def setRoom(self, value):
        log.warning("Cannot set room through mucpresence plugin.")
        return self

    def delNick(self):
        log.warning("Cannot delete nick through mucpresence plugin.")
        return self

    def delRoom(self):
        log.warning("Cannot delete room through mucpresence plugin.")
        return self

class xep_0045(base.base_plugin):
    """
    Implements XEP-0045 Multi User Chat
    """

    def plugin_init(self):
        self.rooms = {}
        self.ourNicks = {}
        self.xep = '0045'
        self.description = 'Multi User Chat'
        # load MUC support in presence stanzas
        registerStanzaPlugin(Presence, MUCPresence)
        self.xmpp.registerHandler(Callback('MUCPresence', MatchXMLMask("<presence xmlns='%s' />" % self.xmpp.default_ns), self.handle_groupchat_presence))
        self.xmpp.registerHandler(Callback('MUCMessage', MatchXMLMask("<message xmlns='%s' type='groupchat'><body/></message>" % self.xmpp.default_ns), self.handle_groupchat_message))
        self.xmpp.registerHandler(Callback('MUCSubject', MatchXMLMask("<message xmlns='%s' type='groupchat'><subject/></message>" % self.xmpp.default_ns), self.handle_groupchat_subject))
        self.xmpp.registerHandler(Callback('MUCInvite', MatchXPath("{%s}message/{http://jabber.org/protocol/muc#user}x/invite" % self.xmpp.default_ns), self.handle_groupchat_invite))

    def handle_groupchat_invite(self, inv):
        """ Handle an invite into a muc.
        """
        logging.debug("MUC invite to %s from %s: %s", inv['from'], inv["from"], inv)
        if inv['from'] not in self.rooms.keys():
            self.xmpp.event("groupchat_invite", inv)

    def handle_groupchat_presence(self, pr):
        """ Handle a presence in a muc.
        """
        got_offline = False
        got_online = False
        if pr['muc']['room'] not in self.rooms.keys():
            return
        entry = pr['muc'].getStanzaValues()
        entry['show'] = pr['show']
        entry['status'] = pr['status']
        if pr['type'] == 'unavailable':
            if entry['nick'] in self.rooms[entry['room']]:
                del self.rooms[entry['room']][entry['nick']]
            got_offline = True
        else:
            if entry['nick'] not in self.rooms[entry['room']]:
                got_online = True
            self.rooms[entry['room']][entry['nick']] = entry
        log.debug("MUC presence from %s/%s : %s", entry['room'],entry['nick'], entry)
        self.xmpp.event("groupchat_presence", pr)
        self.xmpp.event("muc::%s::presence" % entry['room'], pr)
        if got_offline:
            self.xmpp.event("muc::%s::got_offline" % entry['room'], pr)
        if got_online:
            self.xmpp.event("muc::%s::got_online" % entry['room'], pr)

    def handle_groupchat_message(self, msg):
        """ Handle a message event in a muc.
        """
        self.xmpp.event('groupchat_message', msg)
        self.xmpp.event("muc::%s::message" % msg['from'].bare, msg)

    def handle_groupchat_subject(self, msg):
        """ Handle a message coming from a muc indicating
        a change of subject (or announcing it when joining the room)
        """
        self.xmpp.event('groupchat_subject', msg)

    def jidInRoom(self, room, jid):
        for nick in self.rooms[room]:
            entry = self.rooms[room][nick]
            if entry is not None and entry['jid'].full == jid:
                return True
        return False

    def getNick(self, room, jid):
        for nick in self.rooms[room]:
            entry = self.rooms[room][nick]
            if entry is not None and entry['jid'].full == jid:
                return nick

    def getRoomForm(self, room, ifrom=None):
        iq = self.xmpp.makeIqGet()
        iq['to'] = room
        if ifrom is not None:
            iq['from'] = ifrom
        query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
        iq.append(query)
        # For now, swallow errors to preserve existing API
        try:
            result = iq.send()
        except IqError:
            return False
        except IqTimeout:
            return False
        xform = result.xml.find('{http://jabber.org/protocol/muc#owner}query/{jabber:x:data}x')
        if xform is None: return False
        form = self.xmpp.plugin['old_0004'].buildForm(xform)
        return form

    def configureRoom(self, room, form=None, ifrom=None):
        if form is None:
            form = self.getRoomForm(room, ifrom=ifrom)
            #form = self.xmpp.plugin['old_0004'].makeForm(ftype='submit')
            #form.addField('FORM_TYPE', value='http://jabber.org/protocol/muc#roomconfig')
        iq = self.xmpp.makeIqSet()
        iq['to'] = room
        if ifrom is not None:
            iq['from'] = ifrom
        query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
        form = form.getXML('submit')
        query.append(form)
        iq.append(query)
        # For now, swallow errors to preserve existing API
        try:
            result = iq.send()
        except IqError:
            return False
        except IqTimeout:
            return False
        return True

    def joinMUC(self, room, nick, maxhistory="0", password='', wait=False, pstatus=None, pshow=None, pfrom=None):
        """ Join the specified room, requesting 'maxhistory' lines of history.
        """
        stanza = self.xmpp.makePresence(pto="%s/%s" % (room, nick), pstatus=pstatus, pshow=pshow, pfrom=pfrom)
        x = ET.Element('{http://jabber.org/protocol/muc}x')
        if password:
            passelement = ET.Element('password')
            passelement.text = password
            x.append(passelement)
        if maxhistory:
            history = ET.Element('history')
            if maxhistory ==  "0":
                history.attrib['maxchars'] = maxhistory
            else:
                history.attrib['maxstanzas'] = maxhistory
            x.append(history)
        stanza.append(x)
        if not wait:
            self.xmpp.send(stanza)
        else:
            #wait for our own room presence back
            expect = ET.Element("{%s}presence" % self.xmpp.default_ns, {'from':"%s/%s" % (room, nick)})
            self.xmpp.send(stanza, expect)
        self.rooms[room] = {}
        self.ourNicks[room] = nick

    def destroy(self, room, reason='', altroom = '', ifrom=None):
        iq = self.xmpp.makeIqSet()
        if ifrom is not None:
            iq['from'] = ifrom
        iq['to'] = room
        query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
        destroy = ET.Element('destroy')
        if altroom:
            destroy.attrib['jid'] = altroom
        xreason = ET.Element('reason')
        xreason.text = reason
        destroy.append(xreason)
        query.append(destroy)
        iq.append(query)
        # For now, swallow errors to preserve existing API
        try:
            r = iq.send()
        except IqError:
            return False
        except IqTimeout:
            return False
        return True

    def setAffiliation(self, room, jid=None, nick=None, affiliation='member', ifrom=None):
        """ Change room affiliation."""
        if affiliation not in ('outcast', 'member', 'admin', 'owner', 'none'):
            raise TypeError
        query = ET.Element('{http://jabber.org/protocol/muc#admin}query')
        if nick is not None:
            item = ET.Element('item', {'affiliation':affiliation, 'nick':nick})
        else:
            item = ET.Element('item', {'affiliation':affiliation, 'jid':jid})
        query.append(item)
        iq = self.xmpp.makeIqSet(query)
        iq['to'] = room
        iq['from'] = ifrom
        # For now, swallow errors to preserve existing API
        try:
            result = iq.send()
        except IqError:
            return False
        except IqTimeout:
            return False
        return True

    def invite(self, room, jid, reason='', mfrom=''):
        """ Invite a jid to a room."""
        msg = self.xmpp.makeMessage(room)
        msg['from'] = mfrom
        x = ET.Element('{http://jabber.org/protocol/muc#user}x')
        invite = ET.Element('{http://jabber.org/protocol/muc#user}invite', {'to': jid})
        if reason:
            rxml = ET.Element('reason')
            rxml.text = reason
            invite.append(rxml)
        x.append(invite)
        msg.append(x)
        self.xmpp.send(msg)

    def leaveMUC(self, room, nick, msg='', pfrom=None):
        """ Leave the specified room.
        """
        if msg:
            self.xmpp.sendPresence(pshow='unavailable', pto="%s/%s" % (room, nick), pstatus=msg, pfrom=pfrom)
        else:
            self.xmpp.sendPresence(pshow='unavailable', pto="%s/%s" % (room, nick), pfrom=pfrom)
        del self.rooms[room]

    def getRoomConfig(self, room, ifrom=''):
        iq = self.xmpp.makeIqGet('http://jabber.org/protocol/muc#owner')
        iq['to'] = room
        iq['from'] = ifrom
        # For now, swallow errors to preserve existing API
        try:
            result = iq.send()
        except IqError:
            raise ValueError
        except IqTimeout:
            raise ValueError
        form = result.xml.find('{http://jabber.org/protocol/muc#owner}query/{jabber:x:data}x')
        if form is None:
            raise ValueError
        return self.xmpp.plugin['xep_0004'].buildForm(form)

    def cancelConfig(self, room, ifrom=None):
        query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
        x = ET.Element('{jabber:x:data}x', type='cancel')
        query.append(x)
        iq = self.xmpp.makeIqSet(query)
        iq['to'] = room
        iq['from'] = ifrom
        iq.send()

    def setRoomConfig(self, room, config, ifrom=''):
        query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
        x = config.getXML('submit')
        query.append(x)
        iq = self.xmpp.makeIqSet(query)
        iq['to'] = room
        iq['from'] = ifrom
        iq.send()

    def getJoinedRooms(self):
        return self.rooms.keys()

    def getOurJidInRoom(self, roomJid):
        """ Return the jid we're using in a room.
        """
        return "%s/%s" % (roomJid, self.ourNicks[roomJid])

    def getJidProperty(self, room, nick, jidProperty):
        """ Get the property of a nick in a room, such as its 'jid' or 'affiliation'
            If not found, return None.
        """
        if room in self.rooms and nick in self.rooms[room] and jidProperty in self.rooms[room][nick]:
            return self.rooms[room][nick][jidProperty]
        else:
            return None

    def getRoster(self, room):
        """ Get the list of nicks in a room.
        """
        if room not in self.rooms.keys():
            return None
        return self.rooms[room].keys()
